听力原文：W: I need to make some money so that I can go traveling. Do you know any part-time jobs? M: How about sending newspapers? W: I already thought of that, but I don't have a bike. M: How about walking dogs? W: Walking dogs? M: Yes, you know, there're a lot of people around here with dogs. W: Then how much can I earn if I walk dogs? M: More than sending newspapers. The dogs need to be walked every day, especially when people are at work. W: That's a good idea since I like dogs very much. But how can I find dogs to walk? M: You can put an advertisement in the Sunday newspaper. W: Then how much shall I charge for walking a dog? M: You can try for four dollars an hour. W: That's great. Thank you so much. Why did the girl want to make money?